BAADER CMOS S-II NARROWBAND FILTER Size:2" Spot diagram of Takahashi TSA-120

Spot diagram of Takahashi TSA-120 with TOA-35 FL field flattener

3 for wider views and with an image circle of 30mm

69 mm (minor axis)

All Hyperion eyepieces use high quality Phantom group-coatings for maximum contrast and zero internal reflections

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BAADER CMOS S-II NARROWBAND FILTER Size:2" Spot diagram of Takahashi TSA-120The new Baader CMOS optimized S II 4nm 6. 5nm filter is a precision grade ultra narrowband filter with a high transmission at the Sulphur II line at 671. 7nm. It is designed to work very well with modern highly sensitive astronomy cameras and telescopes with focal ratios between f 15 to f 3. 4. The ultra narrow 4nm bandpass make these ideal for imaging under light polluted skies. The 6. 5nm versions are recommended for most cases where there is not a